Mold.



iatented Nov. 23, 1915,

- mow.

APPLICATION HLED FEE.

UNlTEEU STATES JAIYIES CAREY DAVIS, OF HINSDALEILLINOIS.

MOLD.

Specification of Letters Patent.

. Patented Nov. 23, leis.

Application filed February 21, 1911. Serial No. 610,015.

To all whom it may ij'oncern Be it known thatl, JAMES CAREY DAVIS, acitizen of the United States, and a resident of Hinsdale, in the countyof Dupage and State of Illinois, have invented certain new and usefulImprovements in Molds, of which the following is a specification.

My present invention relates to molds use ful in the art of castingmetal in general,

more particularly to metallic molds, and

especially to the provision of improved means whereby a casting ofuninterrupted periphery, and free from cracks may be produced in an ironmold.

The principal objects of my present invention are the provision of animproved form of mold, and more particularly, an iron mold, which I findin practice generally useful in the casting of bodies having relativelylarge centers and peripheral portions and relatively thin intermediateportions, and specially useful when such bodies are made of cast steelwhich has a'tendency to crack peripherally when cast in metal molds,such molds being especially desirable 'for the production of cast steelwheels and like structures wherein not only tread cracks, but alsoflange cracks, as well as fractures in the surface are particularly tobe avoidedg together with such further objects as will hereinafterappear.

In the production of cast steel wheels and other structures by apparatusand processes heretofore known to me I have experienced great difficultyin utilizing iron molds having circular or rounded portions orrelatively thin portions for the production of steel castings, owing tothe tendency, of the steel to cool so rapidly that cracks develop onsuch. circular or rounded portions or in such relatively thin portions.

In accomplishing the foregoing objects,

and overcoming the disadvantages referred to, and in attaining certainfurther benefits to be below disclosed, l have provided theconstructions illustrated in preferred form in the accompanyingdrawings, wherein- Figure 1 is an velevational view, partly ininvention; Figs. 2 and 3 are respectively an:

der'and top plan views of the cope of the mold of Fig. 1; Fig. l is atop plan view of, 2

nnldrag used in forming of the mold of Fig.

l, and Figbris under planyiewbfffthecheek ring used in connection withthe mold of Fig. 1.

Referring now more particularly to Fig.

1 it will be observed that I have here illustrated a form of moldcomprising a cope 1,

a drag 2 and an intermediate cheekipiece 3 which I find specially usefulin carrying out my invention, a wheel being here indicated for purposesof convenience, the, center, tread, and corrugated flange beingrespectively indicated at if, 5 and 6, and the, cope 2 being gated at 7and provided with a sand core as indicated at 8, sand cores also beingprovided at 9 and 10 to allow the formation of narrow necked riserswhich maybe readily broken away. In pouring such structures in anordinary mold I have found-that the tread 5 cracks transversely, butthat by providing the cheek ring 3 with sand inserts 111l arranged atintervals transversely of the tread l have found that the wheel coolsmoreslowly and without surface cracks in such tread, though the otheradvantages of the use of an iron mold remain.

In using iron cope and drag members in the usual manner, or even inconnection with the improved form of cheek piece 3 with sand inserts Ihave found that the web cracks radially, especially at the highest andlowest points of the ,corrugationa'mdiproduce in an iron mold 'a'steelwheel entirely free from cracks. x v

While I have illustratedmy nvention in *conneetien with a. moldavailable for, the

manufacture ofwheeis, and believethat it igparticularly useful for theproduction of vertical section, of a mold embodying my suche i j s andothers wherein'it is espe ciallyadesira'ble to have freedom from cracksmy,.inve 'tion is obviously useful in'the- .3 ananufacture of. othercastingm. I

ther detaih 1 description, and that other adthereof having a curved orrounded surface provided with a plurality of spaced sand insertsextending transversely of'snch curved.

tions.

4:. In a' casting apparatus, a mold comprising metal cope and dragportions, one provided with a check portion having a substantiallyrounded inner periphery provided with spaced sand inserts extendingtransversely of such periphery.

5. In a casting apparatus, a .car wheel mold comprising metal cope anddrag por tions each provided with adially arranged sand inserts.

6. Ina casting apparatus, a car wheel mold comprising metal cope anddrag portions each provided with radially arranged sand inserts, theinserts in the cope being arranged in alternation with those in the moldcomprising a cope, a drag, and a check portion, said cope and drag beingprovided with radial arranged sand inserts, andsaid check portion withsand inserts.

9. In a casting apparatus, a car wheel mold connn-i 'ng' a cope, a drag,and a cheek portion forming a mold cavity, said cope and drag beingprovided with sand inserts extending from adjaceat theperiphery of themold cavity toward the center thereof,

v and said check portion being provided with sand inserts.

10. In a casting apparatus, a car wheel mold comprising a cope and adrag forming a mold cavity, said cope and drag being provided with sandinserts extending from adjacent the periphery of the mold cavity towardthe center thereof.

11. In a casting apparatus, a car wheel mold comprising a cope, a drag,and a cheek portion forming a mold cavity, said cope and dragbeingprovided with sand inserts extending from. adjacent the periphery of themold cavity toward the center thereof and said cheek portion beingprovided with said inserts arranged transversely thereof.

12. In a casting apparatus mold having a curved or rounded surface ofmetal, and an exposed metal surfacc'arranged at an angle thereto, saidfirst mentioned surface being provided with a plurality of spaced sandinserts severally extending transver v thereof substantially the widthof said surface.

In a casting apparatus a mold having a curved or rounded surface ofmetal, and an exposed metal surface arranged at an anglev thereto, saidlast mentioned surface being provided with a plurality of spaced sandinserts severally extending trans-- verscly thereof substantially thewidth of said surface. In testimony whereof I have hereunto signed myname in the presence of the two subscribed. witnesses. Y

7 JAMES CAREY DAVIS.

li'itnesses M. P. SPENCER, A. Tnnvon bonus.

